PRECISION DIGITAL PD6938-GP User manual

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

PRECISION DIGITAL CORPORATION

233 South Street • Hopkinton MA 01748 USA

Tel (800) 343-1001 • (508) 655-7300

www.predig.com

• Field-Mount Pulse Input Flow Rate/Totalizers

• NPN Open Collector, PNP, TTL, Switch Contact,

Sine Wave (Magnetic Pickup Coil), or Active Square Wave Inputs

• Top Display: Five 12-Segment Alphanumeric Characters, 0.7" (17.8 mm)

• Bottom Display: Eight 14-Segment Alphanumeric Characters, 0.4" (10.2 mm)

• Display Mountable at 0°, 90°, 180°, & 270° (No Tools Required)

• CapTouch Through-Window Button Programming with Normal and Delayed Modes

• Red Backlight for Alarm Conditions, Enable and Disable Backlight from Menu

• 8-Digit Total & Grand Total Display, Up to 13 Digits Using Both Lines

• Display Rate & Total Simultaneously

• Bi-Directional Flow Detection Via Digital Input

• Non-Resettable Grand Total

• Display Previous Total and Previous Grand Total with Time-of-Day Reset Feature

• Reset Total / Grand Total with CapTouch Button, Digital Input, or Time-of-Day Feature

• Automatic or Manual Batch Control

• K-Factor Calibration or Scaling with Up to 32-Point Linearization

• Gate Function for Rate Display of Slow Pulse Rates

• (2) Open Collector Outputs Standard; Assignable to Pulse, Alarm, Timer, or Stopwatch

• (2) Optional Solid-State Relays; Assignable to Alarm, Sample, Timer, Batch Control, or Stopwatch

• Optional Isolated 4-20 mA Analog Output

• Free PC-Based MeterView XL USB Programming Software

• 9-30 VDC, Battery, or 4-20 mA Output Power Options

• Battery-Powered Momentary Backlight & Display Sleep and Off Modes to Extend Battery Life

• Modbus RTU RS-485 Communications Standard on DC & Battery Powered Models

• On-Board Data Logging of up to 2,032 Records and Modbus® Accessible Data

• Password Protection for Settings, Total & Grand Total

• Operating Temperature Range: -40 to 167°F (-40 to 75°C)

• Conformal Coated PCBs for Dust & Humidity Protection

• Flange for Wall or Pipe Mounting; Loop for Stainless Steel Tag; Holes for Tamper-Proof Seal

• Plastic NEMA 4X, IP66 Enclosure

• Three 3/4" NPT Threaded Conduit Openings (Two Plugs Installed)

• 3-Year Warranty

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

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The Complete PD6900 Series

Plastic Enclosures - General Purpose

PD6907-GP-PL

4-20 mA Input

Feet & Inches Meter

PD6908-GP-PL

4-20 mA Input

Process Meter

PD6928-GP-PL

4-20 mA Input

Flow Rate/Totalizer

PD6938-GP-PL

Pulse Input

Flow Rate/Totalizer

Aluminum Enclosures - Hazardous Area Approved

PD6907-HA-AL

4-20 mA Input

Feet & Inches Meter

PD6908-HA-AL

4-20 mA Input

Process Meter

PD6928-HA-AL

4-20 mA Input

Flow Rate/Totalizer

PD6938-XX-AL

Pulse Input

Flow Rate/Totalizer

Stainless Steel Enclosures - Hazardous Area Approved

PD6907-HA-SS

4-20 mA Input

Feet & Inches Meter

PD6908-HA-SS

4-20 mA Input

Process Meter

PD6928-HA-SS

4-20 mA Input

Flow Rate/Totalizer

PD6938-XX-SS

Pulse Input

Flow Rate/Totalizer

PD6938 Pulse Input Flow Rate/Totalizer 
Instruction Manual 
 
 
3 
 
Table of Contents 
Introduction .......................................................................................................... 6 
Key Features ........................................................................................................ 7 
Ordering Information ......................................................................................... 13 
-GP Models (General Purpose) ..................................................................... 13 
Accessories ................................................................................................... 13 
Specifications..................................................................................................... 15 
Display ............................................................................................................ 15 
General ........................................................................................................... 15 
Battery ............................................................................................................ 16 
-GP Models (Options: P & R) 3xAA-Cell ..................................................... 16 
Battery Life with Modbus Continuously On..................................................... 16 
Enclosure ....................................................................................................... 16 
Pulse Input ..................................................................................................... 16 
Rate/Totalizer ................................................................................................. 17 
Batch Control ................................................................................................. 17 
Common Open Collector & Relay Specifications ....................................... 17 
Open Collector Outputs ................................................................................ 17 
Solid-State Relays ......................................................................................... 18 
4-20 mA Transmitter Output ......................................................................... 18 
On-Board Digital Input .................................................................................. 18 
Serial Communications ................................................................................. 18 
MeterView XL Software ................................................................................. 18 
General Compliance Information ..................................................................... 19 
Electromagnetic Compatibility ..................................................................... 19 
EU Declaration of Conformity ........................................................................... 19 
Safety Information ............................................................................................. 19 
Installation .......................................................................................................... 20 
Unpacking ...................................................................................................... 20 
Conduit Plugs Included ................................................................................ 20 
Mounting ............................................................................................................. 20 
Dimensions .................................................................................................... 20 
Connections ....................................................................................................... 21 
Display & Options Modules .......................................................................... 21 
Connectors Labeling ..................................................................................... 22 
DC Powered Models (-D Option)................................................................. 22 
DC Powered with Battery Backup Models (-P Option) ................................ 24 
Loop Output Powered Models (-C Option) .................................................. 26 
Loop Output Powered with Battery Backup Models (-R Option) ................. 27 
Wiring Diagrams ................................................................................................ 28 
Pulse Input Connections ............................................................................. 28 
DC Power Connections ............................................................................... 29 
Digital Input Connections ............................................................................ 29 
RS-485 Serial Connections ......................................................................... 29 
4-20 mA Output Connections ...................................................................... 30 
Solid-State Relay Connections.................................................................... 30 
Open Collector Output Connections............................................................ 30 
Remote Operation of Meter ......................................................................... 31 
Setup and Programming ................................................................................... 32 
Overview ......................................................................................................... 32 
CapTouch Buttons ........................................................................................ 32 
CapTouch Buttons Delay ............................................................................ 32 
Turning Off CapTouch Buttons.................................................................... 32 
CapTouch Button Tips & Troubleshooting .................................................. 32 
MeterView XL Programming Software ......................................................... 33 
CapTouch Buttons and Status Indicators ................................................... 34 
Display Functions & Messages .................................................................... 35 
Main Menu ...................................................................................................... 39 
Setting Numeric Values ............................................................................... 40 
Entering the K-Factor (KFACTOR) ...................................................................... 41 

PD6938 Pulse Input Flow Rate/Totalizer 
Instruction Manual 
 
 
4  
Scaling the Pulse Input (SCALE) ....................................................................... 42 
Available Engineering Units ........................................................................ 43 
Volume Units ............................................................................................... 43 
Setting Custom Units (CUSTOM) .................................................................. 44 
Setting the Display Features (DISPLAY) ..................................................... 44 
Changing the Engineering Units (UNITS) ................................................... 44 
Changing the Decimal Point (DEC.PT) ......................................................... 44 
Enabling or Disabling Commas on the Bottom Display (COMMA) ................ 45 
Display Capabilities Optimization (TOP and BOTTOM) ................................ 45 
Using 13 Digits to Display Total .................................................................. 45 
Configuring the Display (TOp and BOTTOM) ................................................ 46 
Programming the Bargraph (BARGRAPH) .................................................... 47 
Programming the Outputs (OUTPUT) ........................................................... 47 
Open Collector Outputs 
(
OPEN COLLECTR
)
 ................................................. 48 
Solid-State Relay Outputs (RELAY) ............................................................ 53 
Isolated 4-20 mA Output (4-20 mA) ............................................................ 60 
Output Manual Control (CONTROL) ............................................................. 60 
Advanced Features Menu (ADVANCE) .......................................................... 61 
Advanced Rate Setup (ADV RATE) ............................................................ 61 
Advanced Total and Grand Total Setup (ADV TOTAL & ADV GTOTAL) .... 64 
Low-Flow Cutoff (CUTOFF).......................................................................... 66 
Gate Function (GATE) ................................................................................. 66 
Contact Debounce Filter (FILTER) ............................................................. 66 
Enabling Password Protection (PASSWRD) ................................................. 68 
Data Log Menu (DATALOG) ......................................................................... 69 
Serial Communications (COMM) ................................................................... 72 
Programmable Function Keys User Menu (USER) ...................................... 72 
Changing System Settings (SYSTEM) ......................................................... 75 
Meter Operation ................................................................................................. 76 
CapTouch Buttons Operation ...................................................................... 76 
CapTouch Buttons ........................................................................................ 76 
Function Keys Operation .............................................................................. 77 
Digital Input Operation .................................................................................. 77 
Maximum/Minimum Readings ...................................................................... 77 
Total Reset Capabilities ................................................................................ 77 
Total Reset via Digital Input ........................................................................ 77 
Total Reset Password Protection ................................................................ 77 
Runtime & Cycle Count (INFO) .................................................................... 78 
Changing Engineering Units ........................................................................ 78 
Batch Controller Operation ............................................................................... 79 
Default Batch Control Operation .................................................................. 79 
 Batch Control Operation Example .............................................................. 79 
Manual Batch Control ................................................................................... 82 
Automatic Batch Control .............................................................................. 83 
Troubleshooting................................................................................................. 84 
Reset Meter to Factory Defaults ................................................................... 84 
Determining Software Version ..................................................................... 84 
Factory Default Settings .............................................................................. 85 
Troubleshooting Tips .................................................................................... 86 

PD6938 Pulse Input Flow Rate/Totalizer 
Instruction Manual 
 
 
5 
 
Table of Figures 
Figure 1. Enclosure Dimensions – Front View .................................................... 20 
Figure 2. Enclosure Dimensions – Side View ..................................................... 20 
Figure 3. Enclosure Dimensions – Bottom View ................................................ 20 
Figure 4. Connector Labeling for PD6938-GP-PL-DNM ...................................... 22 
Figure 5. Connector Labeling for PD6938-GP-PL-D2M ...................................... 22 
Figure 6. Connector Labeling for PD6938-GP-PL-D3M ...................................... 23 
Figure 7. Connector Labeling for PD6938-GP-PL-D5M ...................................... 23 
Figure 8. Connector Labeling for PD6938-GP-PL-PNM ...................................... 24 
Figure 9. Connector Labeling for PD6938-GP-PL-P2M....................................... 24 
Figure 10. Connector Labeling for PD6938-GP-PL-P3M..................................... 25 
Figure 11. Connector Labeling for PD6938-GP-PL-P5M..................................... 25 
Figure 12. Connector Labeling for PD6938-GP-PL-C3N ..................................... 26 
Figure 13. Connector Labeling for PD6938-GP-PL-C5N ..................................... 26 
Figure 14. Connector Labeling for PD6938-GP-PL-R3N ..................................... 27 
Figure 15. Connector Labeling for PD6938-GP-PL-R5N ..................................... 27 
Figure 16. Flowmeter Powered by External Supply (Active) ............................. 28 
Figure 17. Flowmeter Powered by Internal Sensor Power (5 V @ 5 mA) .......... 28 
Figure 18. Self-Powered Magnetic Pickup Flowmeter (Coil).............................. 28 
Figure 19. Bi-Directional Flowmeter Connections .............................................. 28 
Figure 20. NPN Open Collector Input ................................................................... 28 
Figure 21. PNP Sensor with External Power ....................................................... 28 
Figure 22. Switch Contact Input (Reed) ............................................................... 28 
Figure 23. DC Power Connections ....................................................................... 29 
Figure 24. Digital Input Connections ................................................................... 29 
Figure 25. RS-485 2-Wire & Ground Serial Connections.................................... 29 
Figure 26. RS-485 4-Wire & Ground Serial Connections.................................... 29 
Figure 27. 4-20 mA Output Connections ............................................................. 30 
Figure 28. Solid-State Relay Connections ........................................................... 30 
Figure 29. Open Collector Output Connections.................................................. 30 
Figure 30. PDA2361-R Control Station Connected to PD6938........................... 31 
 
   

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

6

Disclaimer

The information contained in this document is

subject to change without notice. Precision Digital

Corporation makes no representations or

warranties with respect to the contents hereof;

and specifically disclaims any implied warranties

of merchantability or fitness for a particular

purpose.

• Read complete instructions prior to installation

and operation of the meter.

• This product is not recommended for life support

applications or applications where malfunctioning

could result in personal injury or property loss.

Anyone using this product for such applications

does so at his/her own risk. Precision Digital

Corporation shall not be held liable for damages

resulting from such improper use.

• Failure to follow installation guidelines could

result in death or serious injury. Make sure only

qualified personnel perform the installation.

WARNING

Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Limited Warranty

Precision Digital Corporation warrants this

product against defects in material or

workmanship for the specified period under

“Specifications” from the date of shipment from

the factory. Precision Digital’s liability under this

limited warranty shall not exceed the purchase

value, repair, or replacement of the defective unit.

See Warranty Information and Terms &

Conditions on www.predig.com for complete

details.

Registered Trademarks

All trademarks mentioned in this document are

the property of their respective owners.

Introduction

The PD6938 VantageView+ pulse input flow

rate/totalizers can be installed in a variety of harsh

operating environments to provide convenient and

informative display of flow rate and total from any

pulse output flowmeter. These instruments will accept

a variety of pulse inputs, including slow pulse rates.

They can be powered from a battery, 9-30 VDC, or

the 4-20 mA output loop, have on-board datalogging

capabilities, operate down to -40°C, and can be

ordered with optional 4-20 mA output and two relays.

The PD6938, with the addition of its two optional

relays, can also be used as a simple batch controller.

One of the most convenient features of these

instruments is their dual-line display, which is typically

used to display the flow rate on the top display and

flow total, flow grand total, or a tag on the bottom

display. The top display has five characters and the

bottom display has eight characters for clear

indication of tags, units, or alarm messages. Further

enhancing the display on these instruments is a

20-segment bargraph and backlighting that can turn

red during an alarm condition.

The PD6938 VantageView+ come in a rugged plastic

NEMA 4X / IP66 enclosure that is designed for easy

use and installation. The enclosure comes with three

3/4" NPT conduit holes and two plastic conduit plugs.

Field wiring is made to removable screw terminals

and the display module can be oriented in 4 different

positions to accommodate different mounting

configurations and requires no tools to install. The

display has been designed to optimize viewing angle.

Free, PC-based, MeterView XL software that

connects to the meter via a micro-USB cable is

available for programming and setup of the

instruments. Four CapTouch through-window buttons

are available to operate the instrument without

removing the cover.

All models come equipped with two open collector

outputs and a digital input. There are also models

available with Modbus RTU RS-485 communications,

two solid-state relays, and isolated 4-20 mA analog

output options. The open collector outputs are useful

for alarm indication or pulse output. The digital input

can be used to reset the total, to start/stop a

timer/stopwatch, to start/stop a batch, and more. The

relays can be programmed for alarm indication, on/off

control, or simple batch control.

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

7

Key Features

2X More Informative Display

The PD6938 display offers a 50% larger display area

and is twice more informative than previous

generations of pulse input meters. Featuring an

alphanumeric dual-line display and a 20-segment

bargraph, reading and understanding process values

is easy and intuitive. The addition of status indicators

provides a quick glance at alarm conditions, relays,

process trends, and more. Predefined display units

give users even more display flexibility. Plus, the high

contrast backlit LCD display is readable from far away

and under various lighting conditions.

Alarm Indication

When an alarm occurs, the display can be

programmed to turn red, flash, and display an alarm

indicator . In addition, a unique custom alarm

message for each of the two relays and two open

collectors can be displayed on the bottom display.

These features can be activated even if no relay or

open collector is connected.

CapTouch Through-Window

Buttons

The PD6938 is equipped with four capacitive sensors

that operate as through-window buttons so that it can

be operated without removing the cover (and

exposing the electronics) in a harsh operating area.

CapTouch buttons are designed to work under any

lighting condition and to protect against false

triggering. They can be turned off for security via a

switch on the display module.

CapTouch buttons have two modes of operation:

Normal and Delayed. Delayed mode prevents

accidental trigger of the buttons. In the Delayed

mode, the buttons enter into a low sensitivity state

(sleep) and they ignore quick button presses after

20 seconds of inactivity. To wake up the buttons,

press and hold any button for more than 2 seconds,

the buttons respond normally.

Solid State Relays 1-2

Indicators

Predefined

Rate Units

Password Protection

Trend

Indicators

CapTouch Buttons

Self-Calibration

Battery Status Indicators

Total or Grand Total

Indicator

Alarm Indicator

Batch Control Indicators

(Run, Stop, Pause)

20-Segment

Bargraph

Two-Color

Backlight

CapTouch Buttons /

Function Keys

Five 12-Segment

Alphanumeric Characters

0.7" (17.8 mm)

Eight 14-Segment

Alphanumeric Characters

0.4" (10.2 mm)

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

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Commas on 8-Digit Totalizer for

Easy Reading

It may seem like a simple thing, but adding commas

to an eight-digit number makes it easier to read:

Predefined and Custom Units

The PD6938 flow rate/totalizer has the most common

predefined rate and volume units. If the desired unit is

not available, the user can program a custom unit.

14-Segment Characters

Notice how much better letters like “T”, “N” and “K”

appear as 14-segment characters on the bottom display

vs. 7-segment characters found on other meters.

Enable / Disable Backlight

The backlight may be enabled or disabled using the

System - Backlight menu. The backlight is enabled by

default, and it is set up to timeout after 10 seconds

when battery power is used. See Enabling or

Disabling the Backlight (BACKLITE) on page 75 for

details.

Multiple Outputs

• Two open collector outputs (standard)

• Two solid-state relays (optional)

• One 4-20 mA output (optional)

The open collector outputs and relays generally

operate in the same manner, with the major exception

being the open collectors are not available for batch

control and the relays are not available with pulse

features. The open collectors and relays can be

controlled either automatically or manually.

The isolated analog output signal can be configured

to represent the process variable (flow rate, total, or

retransmit). It can also be reverse scaled such that

the meter’s high calibration value outputs 4 mA and

the meter’s low calibration outputs 20 mA.

Password Protection

A password can be set up for programming security to

prevent unauthorized changes to the programmed

parameter settings.

Free MeterView XL

Programming Software

The fastest and easiest way to program the meter is

using the free Meterview XL programming software.

This software greatly simplifies the programming

process and allows the user to save configuration files

for later use.

The meter connects to the PC via a provided micro-

USB cable and is powered by the USB connection, so

no additional power is needed during programming.

Easy Wiring & Service

The PD6938 has been designed for easy wiring and

servicing. All connections are made to removable

screw terminal blocks. There are no exposed printed

circuit boards.

Wide Viewing Angle

The window and display module have been optimized

to provide a wide viewing angle of approximately

±40°; nearly twice that of the competition.

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

9

Modern and Practical Enclosure

The PD6938 NEMA 4X, IP66 plastic enclosure

provides serious protection from the elements, high

impact, corrosion, dust, etc.

Direct Mounting

The PD6938 features a bottom 3/4" NPT threaded

conduit opening, which allows easy mounting directly

to a flowmeter. This image shows a battery powered

PD6938 mounted to a turbine flowmeter. Even though

it is battery powered, it has a backlight that turns on

only when CapTouch buttons are in use.

Built-In Flange for Pipe Mounting

The built-in mounting flange allows easy mounting to

walls or pipes.

A slot on the back makes it easy to center the unit on

a pipe. There are three 3/4" NPT threaded conduit

holes for wiring.

SS Tag Attaching Loop

The enclosure is also equipped with a loop to easily

attach a PDA-SSTAG stainless steel tag.

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

10

Tamper-Proof Capability

The instrument can be made tamper-proof by

inserting a wire through the built-in loop on the base

of the enclosure and a hole in the lid of the enclosure

and securing this wire with a lead seal.

Rate/Totalizer Features

Display Flow Rate & Total at the

Same Time

The PD6938 can display flow rate and total at the same

time. In addition, the meter can toggle between the rate

and total and their corresponding units as the following

example illustrates.

Total Limit & Initial Value

The Advanced – Total Count menu allows the digit

limit to be selected between 8-digit (bottom display

only) and 13-digit (uses top and bottom display to

display the full number).

The user can set the initial value at which the total

and grand total should start counting.

Using 13 Digits to Display Total

The top and bottom displays can be set up to display

a 13-digit total.

Note: The number above should be read as

6,843,276,349,187

Total & Rate in Different Units

The user can select to display total in different units

than the rate. For instance, a customer could

measure flow rate in gallons per minute and total in

acre-feet by simply selecting AF (acre-feet) units for

the total. Additionally the user can enter a custom unit

and conversion factor to display the total in any unit of

measure.

Rate in Units Per Second, Minute,

Hour, or Day

The user may select a rate time base in units per

second, minute, hour, or day. The time base is the

amount of time over which the rate parameter will

totalize. For example, if the rate was 10 gallons/min

(and stayed constant for one minute), then the total

would increase by 10 every minute.

4-20 mA Output for Rate or Total

The 4-20 mA output can be assigned to the rate or

the total.

Total Stored in Non-Volatile

Memory

Total and grand total values, and all programmed

settings are stored in non-volatile memory for a

minimum of ten years if power is lost.

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

11

Total Reset Capabilities

The total and grand total can be reset using a

CapTouch button, an external contact closure on the

digital input, or MeterView XL software. In addition,

both total and grand total reset can be password

protected to prevent unauthorized resets.

Time of Day Total Reset

The total and grand total can be set up to reset at a

time of day every day or any day of the week. The

previous total and grand total are saved prior to

applying the reset command. The previous totals can

be read via the F1 function key and the Modbus

registers.

There are four reset times that can be set up, all

choices allow specifying the reset day and time.

Total Reset via CapTouch Button

The CapTouch function key F2 is set up to reset the

total. If reset grand total is enabled, it is possible for the

user to reset either the total or the grand total without

removing the cover or the need for external devices.

Total Reset via Digital Input

The PD6938’s digital input can also be used to reset the

total or grand total.

Total Reset Password Protection

Total and grand total passwords can be set to prevent

resetting the total or grand total unless a password is

entered. Grand total reset can be disabled through

the meter interface, and it can also be permanently

disabled.

Non-Resettable Grand Total

The user can set up the grand total to be non-resettable by

selecting YES at the PERMLOC menu; see page 65 for

details. Once this is done, the grand total can never be reset.

Batch Control Capabilities

The meter can be equipped with two solid-state relays

that may be set up for batch control. Selecting batch

control for relay 1 enables the batching features on the

meter. The top display changes to show the total and the

bottom display changes to show the batch preset. The

function keys also change for batch control functions

such as F1 starts a batch, F2 opens the preset menu to

allow the preset value to be changed, and F3 stops the

currently running batch. Enabling batch control for

relay 1 allows access to the batch menu under relay 2.

The second relay may be programmed as a preclose

relay or as another batching relay with its own preset

amount.

Manual or Automatic Operation

Batching can be set to either manual or automatic

operation.

If set to automatic, then a delay before the next batch

starts must be programmed.

Count Up or Down Batching

The batch total can be set to count up or down.

G+

DI

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

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Data Logging

The PD6938 is capable of data logging up to 2,032

records, each containing date, time, rate, total, grand

total, and relay & open collector states. The user can

choose what information to log, when, and how to log

it. The log file can be downloaded using the

MeterView XL software and it can be saved in .csv file

format.

The easiest way to set up the data logger is using the

MeterView XL software connected via the micro-USB

port or the RS-485 Modbus connection. There are

many ways to log data using the on-board memory.

Use the MeterView XL software to download the data

or a Modbus application.

• Log time: Every day or any day of the week

• Log time interval: Select the logging interval

• Select to log continuously or stop when full

Data Log Example

The log file is saved in .csv file format and it contains

all the information selected in the data log setup.

Power Options

The PD6938 offers a wide range of power options

including DC with battery backup, DC only, output

loop, or output loop with battery backup. See

Specifications for details on each of the power options

available.

Battery Backup

Select models are available with a battery backup

power option. For these models, the primary power

source is supplied by either DC power or the output

loop, depending on the model. The battery is used

during battery backup operation. If there is a power

failure of the primary power source, the battery will

instantly take over powering the meter. There will be

no display interruption nor any information loss.

Battery Status Indication

Battery indicators on the display alert users of the

power status of the PD6938.

Indicator

State

Description

Flashing

Meter checking battery status

Steady

Meter using battery power

Flashing

Low battery

Designed for Long Battery Life

The PD6938 is designed with power savings in mind

to help extend battery life.

LCD Sleep Mode

LCD sleep mode turns the LCD off after a user

programmable amount of time, while all inputs and

outputs continue working. Press any button for 2

seconds to wake up the display.

CapTouch Delayed Mode

In Delayed mode, the buttons enter into a low

sensitivity state (sleep) after 20 seconds of inactivity.

Press any button for 2 seconds to wake up the

buttons.

Momentary Backlight

The backlight is enabled by default. If the meter is

battery powered, then the backlight is automatically

set up to momentarily turn on for 10 seconds when

any button is pressed.

Turn Meter Off

To extend battery life even more, the meter can be

turned off completely when it is not in use. Press and

hold the Menu button for 5 seconds to turn the meter

on or off and follow the on-screen instructions.

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

13

Ordering Information

-GP Models (General Purpose)

Plastic Enclosure

Loop Output Powered4

Model

Description

PD6938-GP-PL-C3N

Pulse Input Field-Mount Flow Rate/Totalizer, 4-20 mA Analog Output

PD6938-GP-PL-C5N

Pulse Input Field-Mount Flow Rate/Totalizer, Two Solid-State Relays & 4-20 mA Analog Output

DC Powered3

Model

Description

PD6938-GP-PL-DNM

Pulse Input Field-Mount Flow Rate/Totalizer, No Options

PD6938-GP-PL-D2M

Pulse Input Field-Mount Flow Rate/Totalizer, Two Solid-State Relays

PD6938-GP-PL-D3M

Pulse Input Field-Mount Flow Rate/Totalizer, 4-20 mA Analog Output

PD6938-GP-PL-D5M

Pulse Input Field-Mount Flow Rate/Totalizer, Two Solid-State Relays & 4-20 mA Analog Output

DC Powered with 3xAA Battery Pack (Primary or Backup)3

Model

Description

PD6938-GP-PL-PNM

Pulse Input Field-Mount Flow Rate/Totalizer, No Options

PD6938-GP-PL-P2M

Pulse Input Field-Mount Flow Rate/Totalizer, Two Solid-State Relays

PD6938-GP-PL-P3M

Pulse Input Field-Mount Flow Rate/Totalizer, 4-20 mA Analog Output

PD6938-GP-PL-P5M

Pulse Input Field-Mount Flow Rate/Totalizer, Two Solid-State Relays & 4-20 mA Analog Output

Loop Output Powered with 3xAA Battery Pack (Backup)4

Model

Description

PD6938-GP-PL-R3N

Pulse Input Field-Mount Flow Rate/Totalizer, 4-20 mA Analog Output

PD6938-GP-PL-R5N

Pulse Input Field-Mount Flow Rate/Totalizer, Two Solid-State Relays & 4-20 mA Analog Output

Notes:

1. All VantageView+ models come with bargraph, two open collector outputs, and one digital input standard.

2. The meter is supplied with three 3/4" NPT conduit holes and two plastic conduit plugs.

3. Modbus is standard on all DC powered models.

4. Modbus is not available with loop-powered models.

Accessories

Model

Description

PDABAT36AA3-PACK

3.6 V Lithium Battery Pack, 3xAA-Cell

PDAPLUG75P

3/4" Plastic Conduit Plug (Two Plugs Included with Meter)

PDA8485-I

USB to RS-485 Isolated Converter

PDA1002

6" DIN Rail Mounting Kit

PDA1024-01

24 VDC Transmitter Power Supply for DIN Rail

PDA6846

Steel 2" U-Bolt Kit. All Material: Zinc Plated Steel; (1) U-Bolt for 2" Pipe with (2) Washers,

(2) Lock Washers, and (2) Nuts

PDA6846-SS

Stainless Steel 2" U-Bolt Kit. All Material: Stainless Steel; (1) U-Bolt for 2" Pipe with (2)

Washers, (2) Lock Washers, and (2) Nuts

PDA-MICROUSB

Micro-USB PC Programming Cable (supplied)

PDA-SSTAG

Custom Stainless Steel Tag (see website for convenient ordering form)

PDA-BUTTON

Momentary Pushbutton

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

14

PDA2360 Plastic Control Stations

Model

Description

PDA2360-E

Emergency Button

PDA2361-A

Ack Button

PDA2361-B

Blank Button

PDA2361-R

Reset Button

PDA2361-T

Tare Button

PDA2361-S

Stop Button

PDA2361-Q

Silence Button

Note:

Control stations can be connected directly to the meter’s

Digital Input terminals labeled G and +. See Remote

Operation of Meter on page 31 for details.

PDA1024-01 24 VDC Power Supply

The PDA1024-01 is a DIN rail mounted 1.5 A,

24 VDC power supply that can be used to power

the PD6938 and the 4-20 mA output.

PDA6846 2" U-Bolt Kits

The PDA6846 U-Bolt Kits provide a convenient way to

mount the meter to 1.5" or 2" pipes. They are

available in steel and stainless steel.

PDA-SSTAG Stainless Steel Tag

The PDA-SSTAG is a laser etched stainless steel tag

that can be customized with three lines of text.

Each tag comes with a stainless steel wire and lead

seal for easy mounting wherever you need.

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

15

Specifications

Except where noted all specifications apply to operation at +25°C.

Display

Dual-line LCD with backlight.

Both lines: alphanumeric

Top: 0.7" (17.8 mm) 5 digits, 12-segment

Bottom: 0.4" (10.2 mm) 8 characters,

14-segment

Display may be programmed to turn red and

flash a user-defined message on alarm

condition.

LCD Sleep

Never, 1, 2, 5, 10, 20, 60 min

Default: 10 min when battery powered; press

any key for 2 sec to wake up the display.

All inputs and outputs continue working.

Turn Meter

Off/On

Press & hold the Menu key for 5 sec and

follow the on-screen instructions. This feature

helps extend battery life.

On-Screen

Indicators

See CapTouch Buttons and Status Indicators

on page 34 for details.

Top Display

5 digits (-9999 to 99999) or 5 characters (all

capital & most lower-case letters)

Bottom

Display

8 digits (-9,999,999 to 99,999,999; separated

by commas) or 8 characters

(all capital & most lower-case letters)

Backlight

Normal: white LED (enabled by default)

Alarm: red LED (default)

DC powered: steady on

Battery powered: momentary (default: 10 sec)

Output loop powered: varying intensity based

on 4-20 mA output current

Bargraph

20 segments (100% label at top fixed)

Assignable to rate, total, or off

Scale: 0 to 100%

Display

Assignment

Top & bottom displays can be assigned to

rate, total, grand total, etc. See Configuring

the Display (TOp and BOTTOM) on page 46 for

a complete list of assignable parameters.

Decimal Point

Up to four decimal places on top display and

up to seven decimal places on bottom display

Commas

Commas to indicate 1000s

(e.g. 88,987,628) on the bottom display

Alarm

Indication

Programmable: red backlight, flashing display,

alarm symbol , bargraph segment flashes

on alarm.

Custom

Alarm

Messages

Programmable for each relay/open collector:

8 characters maximum; displayed every 10

sec for 1 sec on bottom display. May be

turned off.

Display

Update Rate

Ambient > -10°C: 4 updates/second

Ambient = -20°C: 1 update/2 seconds

From -20°C to -40°C the update rate slows

down 1 second for every -2°C

(e.g. at -24°C, 1 update/4 seconds).

Below -40°C the display is not readable, but

all the inputs and outputs work correctly.

Overrange

Top: 99999; Bottom: 99,999,999 (flashing)

Underrange

Top: -9999; Bottom: -9,999,999 (flashing)

General

Programming

Method

Four CapTouch through-window buttons

when cover is installed. The CapTouch

buttons can be used with the cover removed.

Free PC-based USB MeterView XL

programming software.

Recalibration

Recommended at least every 12 months.

Environmental

Operating temperature range:

-40 to 75°C (-40 to 167°F)

Storage temperature range:

-55 to 85°C (-67 to 185°F)

Relative humidity: 0 to 90% non-condensing.

Printed circuit boards are conformally coated

Max / Min

Display

Max / min readings reached by the process

are stored until reset by the user or until

power to the meter is turned off.

Password

There are three separate passwords available

that can be set independently of each other:

Main, Total, and Grand Total. The Main

password prevents access to the meter

Programming Mode. Total and Grand Total

passwords prevent resetting the total and

grand total, respectively.

Non-Volatile

Memory

Total and Grand Total values, and all

programmed settings are stored in non-

volatile memory for a minimum of ten years if

power is lost.

Power

Options

9-30 VDC Powered, 2 W max

9-30 VDC Powered with Battery Backup

Loop Output Powered (30 VDC max)

Loop Output Powered with Battery Backup

Data Logging

Up to 2,032 records, recorded 4/day at

specific times or at defined time intervals.

Record contains date, time, rate, total, grand

total, and open collectors & relays states.

Data Logging

Modes

Continuous: The log data will wrap around,

erasing the oldest records to save the new

records. Banks of 16 records will be erased at

a time.

Stop when full: The log will stop recording

when full and “LOG FULL” is displayed every

10 sec.

Connections

Removable screw terminal blocks

Display terminals: accept 16 to 30 AWG wire

Relay terminals: accept 12 to 26 AWG wire

4-20 mA output: accept 16 to 30 AWG wire

Tightening

Torque

Display terminals: 2.5 lb-in (0.28 Nm)

Relay terminals: 4.5 lb-in (0.5 Nm)

4-20 mA output terminals: 2.5 lb-in (0.28 Nm)

Overall

Dimensions

5.25" x 5.65" x 4.18" (133 x 144 x 106 mm)

(W x H x D)

Weight

1.9 lbs (0.9 kg)

Warranty

3 years parts and labor. See Warranty

Information and Terms & Conditions on

www.predig.com for complete details.

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

16

Battery

Battery life is dependent on how the meter is used. Backlight

should only be used momentarily (10 sec on). Modbus should

rarely be used on battery-power, it requires approximately

26 mA. See battery life table below for details.

-GP Models (Options: P & R) 3xAA-Cell

Battery Type

3.6 V Lithium (Li-SOCl2), non-rechargeable

P/N: PDABAT36AA3-PACK

Battery Life

Operating

Condition

@ 2,000 Hz

Estimated

Service Life

Suggested

Replacement

Interval

Monitoring only,

backlight off

35 months

30 months

LCD sleep*,

minimal CapTouch

use, backlight off

57 months

50 months

100 Hz open

collector 1&2

outputs, minimal

backlight use

24 months

20 months

Battery

Replacement

Replace only with a Precision Digital original

Model PDABAT36AA3-PACK

Battery Life with Modbus Continuously On

3XAA-Cell

277 hours

*LCD sleep: Press any key to wake up the display. All input

& outputs continue working in LCD Sleep mode.

Enclosure

Material

Polycarbonate plastic with UV stabilizer

Gasket

Buna-N

Rating

NEMA 4X, IP66 plastic, UL 94V-0

Color

Gray

Window

Clear polycarbonate with UV stabilizer

Conduits

Three 3/4" NPT threaded conduit openings

Conduit

Stopping

Plug

Two 3/4" NPT plastic conduit plugs with 1.29"

wrenching flats and a screwdriver slot are

included

Flange

Built-in flange for wall and pipe mounting.

Tamper-Proof

Seal

Enclosure lid may be secured with

tamper-proof seal.

Instrument

Tag Loop

Built-in loop for securing stainless steel tag

Overall

Dimensions

5.25" x 5.65" x 4.18" (133 x 144 x 106 mm)

(W x H x D)

Weight

1.4 lbs (0.64 kg)

Pulse Input

Pulse,

Transistor,

Contact

Closure

Pulse or square wave:

0-5 V, 0-12 V, or 0-24 V; TTL; NPN or PNP

Open collector: 100 kΩ pull-up to 2.8 V

Switch contact: 100 kΩ pull-up to 2.8 V

PNP transistor: 100 kΩ pull-down to ground

Active input: 100 kΩ pull-up to 2.8 V

NPN strong: 10 kΩ pull-up to 2.8 V (Do not

use with battery power)

Maximum Frequency: 100 kHz

Minimum Pulse Width: 5 µs

Threshold Setting Low (V) High (V)

Active/NPN 0.5 1.8

Active/NPN High 2.8 4.8

Magnetic

Pickup Coil

Sensitivity: 10 mVp-p to 24 Vp-p

Maximum Frequency: 40 kHz

Note: 10 mVp-p @ 300 Hz max

Sensor

Power

5 VDC @ 5 mA

Enabled in the Advanced – System menu

Minimum

Input

Frequency

0.0001 Hz

Minimum frequency is dependent on high gate

setting (rate display)

Input

Impedance

Pulse input: Greater than 75 k @ 1 kHz.

Open collector/switch: 100 k pull-up to 2.8 V

Contact

Debounce

Filter

Programmable contact debounce filter.

Input signal frequency speed selections:

Disable: Greater than 100 kHz (no filter)

Fast: 1,000 Hz

Medium: 240 Hz

Slow: 100 Hz

Accuracy

Rate: ±0.02% of calibrated span ±1 count

Total: Every input pulse is counted

Temperature

Drift

2 PPM/°C from -40 to 75°C ambient

Function

K-Factor: 0.000001 to 9,999,999

Rate: Linear (2-32 points)

Low-Flow

Cutoff

0.1 to 999,999 or disable. Point below at which

the display always shows zero.

HART

Transparency

The 4-20 mA output does not interfere with

existing HART communications.

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

17

Rate/Totalizer

Rate Display

Top display: -9999 to 99999;

Bottom display: -9,999,999 to 99,999,999

(with commas)

Total & Grand

Total Display

Top display: 0 to 99999;

Bottom display: 0 to 99,999,999 (with commas)

13-Digit Total

& Grand Total

Up to 9,999,999,999,999 using both lines

with 13-digit total feature enabled.

Total Decimal

Point

Up to four decimal places on top, up to seven

decimal places on bottom. Total decimal

point is independent of rate decimal point.

Totalizer

Calculates total based on input pulses and

rate units to display total in engineering units.

A custom factor must be programmed if using

custom defined units.

Time Base

Seconds, Minutes, Hours, Days

Totalizer

Rollover

Totalizer rolls over when display exceeds

99,999,999 (9,999,999,999,999 if 13-digit

limit enabled). Relay status reflects display.

Total & Grand

Total Reset

Via CapTouch button, external contact

closure on digital input, automatic based on

time of day, or MeterView XL.

Time of Day

Total & Grand

Total Reset

Four programmable reset times.

The total and grand total can be set up to

reset at a time of day every day or any day.

Total

Total & grand total are saved prior to applying

the reset command.

The previous totals can be read via the F1

function key and the Modbus registers.

Total & Grand

Total Reset

Passwords

Total and grand total passwords may be

entered to prevent resetting the total or grand

total unless a password is entered.

Non-

Resettable

Grand Total

Grand total reset may be disabled through

the meter interface. Grand total reset may be

permanently disabled by selecting YES at the

PERMLOCK menu.

• Once the Grand Total has been programmed as

“non-resettable” the feature CANNOT be disabled.

Non-Volatile

Memory

Total and Grand Total values are stored in

non-volatile memory for a minimum of ten

years if power is lost.

Batch Control

Methods

Automatic or Manual, count up or count down

Manual Batch

Start

Pressing F1 function key starts the batch

Manual Batch

Pause/Stop

Pressing F3 once pauses the batch,

pressing it twice cancels the batch

Automatic

Batching

The VantageView+ can be used as an

automatic batch controller where batches

run continuously without operator input

Batching Relay

Operation

Single or dual-relay batching with optional

preclose for dual-stage operation

Batch Preset

Set via F2 function key anywhere between

0.0001 to 99,999 based on batch total

decimal point. If batch total is assigned to

bottom, the preset can be up to 8 digits.

Batch Preclose

For two-stage batch application, a preclose

value can be set to close the main flow line.

Automatic Batch

Restart Delay

1 to 9,999 seconds. The batch will

automatically restart after completion

of the last batch.

Common Open Collector &

Relay Specifications

Number

Two open collectors & two relays

High or Low

Alarm

User programmable for high or low alarm

Alarm

Deadband

0-100% FS, user programmable

Output

Assignment

Alarm, Timer, Stopwatch, or Disable

Alarm Output

Source

Assign to rate, total, grand total, or digital

input

On & Off Time

Delay

0 to 9,999 seconds

Fail-Safe

Operation

Independent for each open collector and

relay.

Fail-safe on, the output is on under normal

conditions.

Fail-safe off, the output is on under alarm

conditions.

Alarm

Operation

Automatic, automatic with manual override,

latching (manual reset anytime), latching with

reset after cleared (manual reset only after

alarm has cleared)

Alarm

Indication

Programmable: loop-powered red backlight,

flashing display, alarm symbol , bargraph

segment flashes on alarm.

Custom

Alarm

Messages

Programmable for each relay/open collector:

8 characters maximum; displayed every 10 sec for

1 sec on bottom display. May be turned off.

Alarm

Acknowledge

CapTouch ACK button or external digital

input resets output and screen indication.

Auto

Initialization

When power is applied to the meter, open

collectors and relays will reflect

the state of the input to the meter.

Timer Output

One-shot or Continuous

Off Time Delay: 1 sec to 99:59:59

(hrs:min:sec)

On Time: 1 sec to 99:59:59 (hrs:min:sec)

Stopwatch

Output turns on when started and off when

stopped.

Open Collector Outputs

Rating

Isolated open collector, sinking NPN

5-30 VDC @ 150 mA maximum

Output

Assignment

Pulse, Alarm, Timer, Stopwatch, or

Disable

Pulse Output

Source

Pulse output based on Rate, Total,

Grand Total, or Test Frequency, Alarm,

Timer, Total Reset, Stopwatch on/off, or

Disable

Pulse Output

Factor

0.000001 to 999,999.9

Pulse Width

0.25 ms @ 2 kHz; 500 ms @ 1 Hz;

50% duty cycle

Pulse Output

Frequency

2,000 Hz maximum

Quadrature Pulse

Output

Available for Output 2

(90° behind Output 1) 1000 Hz max

Alarm Output

Source

Assign to Rate, Total, Grand Total or

Digital Input

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

18

Solid-State Relays

Rating

250 VAC/VDC @ 0.5 A resistive

38 VA; 250 VAC; 0.3 A pilot duty

(inductive)

13 VA; 250 VDC; 0.3 A pilot duty

(inductive)

Noise

Suppression

Metal oxide varistors across outputs

Relay

Assignment

Alarm, Sample, Timer, Batch, Stopwatch

on/off, or Disable

Alarm Output

Source

Assign to Rate, Total, Grand Total, or

Digital Input

Relay

Runtime

Meter will keep track of how long each

relay has operated and display this

information.

Relay

Cycles

Meter will keep track of how many times

the relays have cycled and display this

information.

4-20 mA Transmitter Output

Accuracy

±0.05% FS ±0.001mA

Output Source

Rate, total; reverse scaling allowed

Scaling Range

1.00 to 23.0 mA

Disable

High impedance state, less than 1 mA

Calibration

Factory calibrated:

0 to 100 GAL/Sec = 4.00 to 20.00 mA

Underrange

1.0 mA, 3.5 mA, 3.8 mA; or Off;

user selectable

Overrange

20.5 mA, 20.8 mA, 23.0 mA, or Off;

user selectable

Isolation

500 V input-to-output

Temperature

Drift

0.003 mA max from -40 to 75°C ambient

External Loop

Power Supply

7.0 VDC to 30.0 VDC maximum

Output Loop

Resistance

10-750 Ω @ 24 VDC; 10-1100 Ω @ 30 VDC

(External resistance to maintain accuracy)

On-Board Digital Input

Function

Remote operation of front-panel buttons,

acknowledge/reset relays, reset total,

reset max/min values, start/stop batch,

etc. See User section of Display

Functions & Messages on page 35 for a

complete list of capabilities.

Contacts

2.1 VDC on contact. Connect normally

open contacts across G and +

Logic Levels

Logic High: 2.4 to 30 VDC (max)

Logic Low: 0 to 0.9 VDC

Serial Communications

Connection

RS-485, 3-wire; Isolation: 500 V.

Non-isolated micro-USB.

Protocol

Modbus® RTU

Meter Address /

Slave ID

1 - 247

Baud Rate

1,200; 2,400; 4,800; 9,600; 19,200;

38,400; or 57,600 bps.

Transmit Time

Delay

Programmable between 0 and 199 ms

Parity/Stop Bit

Even, odd, or none with 1 or 2 stop bits

Byte-to-Byte

Timeout

Max of 1.5 character times or 2.25 ms

Note: Refer to the ProtEX+ and VantageView+ PD6938

Modbus® Register Tables located at www.predig.com for

details.

MeterView XL Software

Availability

Free download from

www.predig.com/meterviewxl

System

Requirements

Microsoft® Windows® 10 & 11

Communications

USB 2.0 (Standard USB A to Micro USB B)

Cable provided

Configuration

Configure all parameters on the meter.

Configure meters one at a time.

Configuration

Files

Generate with or without meter

connected; Save to file for later use.

USB Power

Connection

The meter is powered by the USB

connection during programming. There

is no need to apply external power.

Note: The meter will not be damaged if

external power is applied to it during

programming.

• The meter should only be connected to a computer while

it is located in a safe area

Data Logging

Report

The on-board data log can be

downloaded via the USB or the RS-485

connection.

Saved as “.csv” file format.

PC Data Logging

MeterView XL can be used to data log

directly to a computer connected to the

meter via the USB or the RS-485

connection. The user can select what to

log and at what interval.

• Rate

• Total

• Grand total

• Open collector triggers

• Relay triggers

• Hold/Unhold outputs

Compatibility

Programs created for VantageView+ and

ProtEX+ can be run on either meter. No

other program sharing is permissible.

To download the latest MeterView XL programming

software and manual, visit predig.com/meterviewxl.

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

19

General Compliance

Information

Electromagnetic Compatibility

EMC Emissions

• CFR 47 FCC Part 15 Subpart B Class A

emissions requirements (USA)

• ICES-003 Information Technology

emissions requirements (Canada)

• AS/NZS CISPR 11 Group 1 Class A

ISM emissions requirements

(Australia/New Zealand)

• EN 55011 Group 1 Class A ISM

emissions requirements (EU)

• EN 61000-6-4 Emissions requirements

for Heavy Industrial Environments -

Generic

EMC Emissions

and Immunity

EN 61326-1 EMC requirements for

Electrical equipment for measurement,

control, and laboratory use – industrial use

EU Declaration of

Conformity

For shipments to the EU and UK, a Declaration of

Conformity was printed and included with the product.

For reference, a Declaration of Conformity is also

available on our website www.predig.com/docs.

Safety Information

• Read complete instructions prior to installation

and operation of the meter.

• Hazardous voltages exist within enclosure.

Installation and service should be performed only

by trained service personnel.

• Service requiring replacement of internal

components must be performed at the factory.

• Control room equipment must not use or

generate more than 250 VRMS or VDC.

• PD6938 powered by the 4-20 mA output loop do

not add capacitance or inductance to the loop

under normal or fault conditions.

• Equipment contains non-metallic materials and

therefore special care and consideration should

be made to the performance of these materials

with respect to chemicals which may be present

in a harsh operating environment.

PD6938 Pulse Input Flow Rate/Totalizer

Instruction Manual

20

Installation

To access the connectors, remove the enclosure

cover and unclip the display module by pulling it from

the enclosure. The display module may be

disconnected from the options module to facilitate

wiring to the options module.

Unpacking

Remove the meter from box. Inspect the packaging

and contents for damage. Report damages, if any,

to the carrier.

If any part is missing or the meter malfunctions,

please contact your supplier or the factory for

assistance.

Conduit Plugs Included

The PD6938 is supplied with two plastic conduit plugs

for installations that do not require the use of all three

conduit entries.

Mounting

The PD6938 has a slotted mounting flange that may

be used for pipe mounting or wall mounting.

Alternatively, the unit may be supported by the

conduit using the conduit holes provided. Refer to

Figure 1 and Figure 2.

• Do not attempt to loosen or remove flange bolts

while the meter is in service.

Dimensions

Figure 1. Enclosure Dimensions – Front View

Figure 2. Enclosure Dimensions – Side View

Figure 3. Enclosure Dimensions – Bottom View

5.25" (133 mm)

3.35" (85.1 mm)

2.25"

(57.2 mm)

0.32"

(8.2 mm)

5.65"

(144 mm)

4.18"

(106 mm)

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PRECISION DIGITAL PD6938-GP User manual

PRECISION DIGITAL PD6938-GP User manual

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